Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, -1), (-1, -1, 1), (-1, 1, -1), (1, -1, 0), (1, 1, 0)}.
A148543
Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, -1), (-1, -1, 1), (-1, 1, -1), (1, -1, 0), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =5a(4) =19a(5) =45a(6) =173a(7) =449a(8) =1855a(9) =5419a(10) =22327a(11) =67507a(12) =289295a(13) =931453a(14) =3969825a(15) =12998177a(16) =56872875a(17) =193906079a(18) =843340791a(19) =2901823841a(20) =12869556293a(21) =45583222801a(22) =200960786165a(23) =715524927773
External references
- oeis: A148543